Spread of West Nile Virus in the Americas (IMAGE) Entomological Society of America Caption In 1999, West Nile virus was detected in the United States for the first time, and within five years it had spread from New York across the contiguous United States and into Canada, Mexico, and Central and South America. A new special collection in the Journal of Medical Entomology takes stock of lessons learned and progress made over the past 20 years of West Nile virus research, surveillance, and control. Credit <i>Journal of Medical Entomology</i> Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.